使用FileChannel实现文件的复制和移动方式

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;

public class FileCopyWithFileChannel {
    public static void main(String[] args) {
        try (FileInputStream fis = new FileInputStream("source.txt");
             FileOutputStream fos = new FileOutputStream("target.txt");
             FileChannel sourceChannel = fis.getChannel();
             FileChannel targetChannel = fos.getChannel()) {

            // 使用 transferFrom 方法复制文件
            targetChannel.transferFrom(sourceChannel, 0, sourceChannel.size());
            System.out.println("文件复制成功");
        } catch (IOException e) {
            System.err.println("文件复制失败: " + e.getMessage());
        }
    }
}    

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;

public class FileMoveWithFileChannel {
    public static void main(String[] args) {
        File sourceFile = new File("source.txt");
        File targetFile = new File("target.txt");

        try (FileInputStream fis = new FileInputStream(sourceFile);
             FileOutputStream fos = new FileOutputStream(targetFile);
             FileChannel sourceChannel = fis.getChannel();
             FileChannel targetChannel = fos.getChannel()) {

            // 使用 transferFrom 方法复制文件
            targetChannel.transferFrom(sourceChannel, 0, sourceChannel.size());

            // 删除源文件
            if (sourceFile.delete()) {
                System.out.println("文件移动成功");
            } else {
                System.err.println("源文件删除失败");
            }
        } catch (IOException e) {
            System.err.println("文件移动失败: " + e.getMessage());
        }
    }
}